i'm bob, we talked at the tax store. i did your taxes. i thought you were a tax expert? today, i'm a master plumber. major tax stores advertise for preparers with "no tax experience necessary." at turbotax, you only get answers from cpas, eas or tax attorneys - all real tax experts. ...than h&r block stores and all other major tax stores narrowing in on a sideshow that took place in the middle of interstate 880. the stunt could have had deadly consequences. alan wang has the latest on the investigation and the 9-1-1 calls that came in during that incident. >> oh my gosh. >> the chp is getting an abundance of information leading to the drivers involved in this sideshow. it happened on saturday afternoon around 4:00 right in the middle of 880 in oakland. >> it is being shown on the internet and somebody posted it. i saw a comment saying they knew someone in the video. >> an anonymous caller who gave crucial information to the chp spoke exclusively to abc7 news. he says he saw postings on facebook implicating the drivers. the chp also released 9-1-1 calls from people witnes